Remove .tox for master builds.
Remove .tox for master builds.

StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2,nzlosh/st2,StackStorm/st2,Plexxi/st2,StackStorm/st2,Plexxi/st2,nzlosh/st2,Plexxi/st2